CN109391152A - Cascade buck-boost type DC-DC converter - Google Patents
Cascade buck-boost type DC-DC converter Download PDFInfo
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- CN109391152A CN109391152A CN201811336763.8A CN201811336763A CN109391152A CN 109391152 A CN109391152 A CN 109391152A CN 201811336763 A CN201811336763 A CN 201811336763A CN 109391152 A CN109391152 A CN 109391152A
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- 239000003990 capacitor Substances 0.000 claims abstract description 163
- 238000004146 energy storage Methods 0.000 claims abstract description 105
- 239000004065 semiconductor Substances 0.000 claims abstract description 46
- 230000005611 electricity Effects 0.000 claims description 9
- 230000001939 inductive effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 11
- 238000004088 simulation Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
A kind of cascade buck-boost type DC-DC converter, including inductance L1, 1 booster type capacitor and inductor energy-storage module, 1 voltage-dropping type capacitor and inductor energy-storage module and capacitor Co, booster type capacitor and inductor energy-storage module includes diode Da_1, capacitor Ca_1, inductance La_1 and electronic switch Sa, voltage-dropping type capacitor and inductor energy-storage module includes diode Db_1, capacitor Cb_1, diode Db_2, inductance Lb_1 and electronic switch Sb, electronic switch Sa includes diode Da_2, N-type metal-oxide-semiconductor Ma_1 and controller a, electronic switch Sb includes diode Db_3, N-type metal-oxide-semiconductor Mb_1 and controller b.The present invention has a following operating characteristic: simple, the applicable control method multiplicity of circuit structure, output and input electric current is continuous, output with input voltage altogether and polarity is consistent, output voltage Vo is more than or less than or equal to direct current power source voltage Vi.
Description
Technical field
The present invention relates to DC-DC (DC-DC) converter, especially one kind, to output and input electric current continuous and input
With the cascade buck-boost type DC-DC converter of output voltage same polarity, it can be used as basic unit and set up multi input and multi output
DC power system, such as: DC power supplier parallel system, LED array drive system, distributed photovoltaic power generation system.
Background technique
The existing basic DC-DC converter with stepping functions include One Buck-Boost converter body, Cuk converter,
Sepic converter and Zeta converter.As listed in table 1, in the case where not considering output capacitance, above-mentioned this 4 kinds have lifting
The basic DC-DC converter of pressure function is all unsatisfactory for " output and input electric current continuous and output and input voltage same polarity "
It is required that.
Table 1
By the way of cascading basic DC-DC converter, Boost and Buck converter are cascaded, can be obtained
It is continuous and output and input the buck-boost type DC-DC converter of voltage same polarity that electric current must be output and input, but a combination thereof
There are the discontinuous problems of electric current for inside.
Summary of the invention
In order to overcome the buck-boost type DC- of existing " output and input electric current continuous and output and input voltage same polarity "
There are the discontinuous problem of electric current inside the combination of Boost and Buck in DC converter concatenated schemes, the present invention provides a kind of grade
The buck-boost type DC-DC converter of connection, can be realized output and input that electric current is continuous, electric current is still continuous between grade and input and
Output common ground expands the type of buck-boost type DC-DC converter with this.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of cascade buck-boost type DC-DC converter, including inductance L1,1 booster type capacitor and inductor energy-storage module, 1
A voltage-dropping type capacitor and inductor energy-storage module and capacitor Co, booster type capacitor and inductor energy-storage module have port Via+, port Voa+
With port Gnda, voltage-dropping type capacitor and inductor energy-storage module has port Vib+, port Vob+ and port Gndb, one end of capacitor Co
It is connected with one end of load Z, the other end for loading Z is electric with the other end of capacitor Co, the negative terminal of DC power supply Vi, booster type simultaneously
The port Gnda for holding inductive energy storage module is connected with the port Gndb of voltage-dropping type capacitor and inductor energy-storage module, booster type capacitor and inductor
The rest part and inductance L1 of energy-storage module and voltage-dropping type capacitor and inductor energy-storage module are between DC power supply Vi and capacitor Co
It and is in series relationship；
The booster type capacitor and inductor energy-storage module includes diode Da_1, capacitor Ca_1, inductance La_1 and electronic switch
Sa, the electronic switch Sa have a port c and port d, the anode of diode Da_1 simultaneously with booster type capacitor and inductor energy storage mould
The port c of the port Via+ and electronic switch Sa of block are connected, the cathode of diode Da_1 one end with capacitor Ca_1 and liter simultaneously
The port Voa+ of die mould capacitor and inductor energy-storage module is connected, the port d of electronic switch Sa simultaneously with the other end of capacitor Ca_1 and
One end of inductance La_1 is connected, and the other end of inductance La_1 is connected with the port Gnda of booster type capacitor and inductor energy-storage module；
The voltage-dropping type capacitor and inductor energy-storage module includes diode Db_1, capacitor Cb_1, diode Db_2, inductance Lb_1
There is port e and port f with electronic switch Sb, the electronic switch Sb, one end of capacitor Cb_1 is electric with voltage-dropping type capacitor simultaneously
The port e of port Vib+ and electronic switch Sb for feeling energy-storage module is connected, the other end of capacitor Cb_1 and meanwhile with diode Db_1
Anode be connected with one end of inductance Lb_1, the cathode of the diode Db_1 port with voltage-dropping type capacitor and inductor energy-storage module simultaneously
Vob+ is connected with the port f of electronic switch Sb, and the other end of inductance Lb_1 is connected with the cathode of diode Db_2, diode Db_2
Anode be connected with the port Gndb of voltage-dropping type capacitor and inductor energy-storage module.
A kind of preferred connection type is: the port Via+ and DC power supply Vi of booster type capacitor and inductor energy-storage module are just
End is connected, and the port Voa+ of booster type capacitor and inductor energy-storage module is connected with one end of inductance L1, the other end and drop of inductance L1
The port Vib+ of die mould capacitor and inductor energy-storage module is connected, the port Vob+'s and capacitor Co of voltage-dropping type capacitor and inductor energy-storage module
One end is connected.
When electronic switch Sa cut-off, diode Da_1 conducting, DC power supply Vi, diode Da_1, inductance L1 and decompression
Type capacitor and inductor energy-storage module constitutes a circuit, and DC power supply Vi, diode Da_1, capacitor Ca_1 and inductance La_1 constitute another
One circuit.
When electronic switch Sa conducting, diode Da_1 cut-off, DC power supply Vi, electronic switch Sa and inductance La_1 are constituted
One circuit, DC power supply Vi, electronic switch Sa, capacitor Ca_1, inductance L1 and voltage-dropping type capacitor and inductor energy-storage module constitute another
One circuit.
When electronic switch Sb cut-off, diode Db_1 conducting, booster type capacitor and inductor energy-storage module, inductance L1, capacitor
Cb_1, diode Db_1, capacitor Co and load Z constitute a circuit, diode Db_2, inductance Lb_1, diode Db_1, capacitor
Co and load Z constitute another circuit.
When electronic switch Sb conducting, diode Db_1 cut-off, booster type capacitor and inductor energy-storage module, inductance L1, electronics
Switch Sb, capacitor Co and load Z constitute a circuit, diode Db_2, inductance Lb_1, capacitor Cb_1, electronic switch Sb, capacitor
Co and load Z constitute another circuit.
Another preferred connection type is: the port Vib+ and DC power supply Vi of voltage-dropping type capacitor and inductor energy-storage module
Anode be connected, the port Vob+ of voltage-dropping type capacitor and inductor energy-storage module is connected with one end of inductance L1, the other end of inductance L1 and
The port Via+ of booster type capacitor and inductor energy-storage module is connected, the port Voa+ and capacitor Co of booster type capacitor and inductor energy-storage module
One end be connected.
When electronic switch Sb cut-off, diode Db_1 conducting, DC power supply Vi, capacitor Cb_1, diode Db_1, inductance
L1 and booster type capacitor and inductor energy-storage module constitute a circuit, diode Db_2, inductance Lb_1, diode Db_1, inductance L1
Another circuit is constituted with booster type capacitor and inductor energy-storage module.
When electronic switch Sb conducting, diode Db_1 cut-off, DC power supply Vi, electronic switch Sb, inductance L1 and boosting
Type capacitor and inductor energy-storage module constitutes a circuit, diode Db_2, inductance Lb_1, capacitor Cb_1, electronic switch Sb, inductance L1
Another circuit is constituted with booster type capacitor and inductor energy-storage module.
When electronic switch Sa cut-off, diode Da_1 conducting, voltage-dropping type capacitor and inductor energy-storage module, inductance L1, two poles
Pipe Da_1, capacitor Co and load Z constitute a circuit, voltage-dropping type capacitor and inductor energy-storage module, inductance L1, diode Da_1, electricity
Hold Ca_1 and inductance La_1 and constitutes another circuit.
When electronic switch Sa conducting, diode Da_1 cut-off, voltage-dropping type capacitor and inductor energy-storage module, inductance L1, electronics
Switch Sa and inductance La_1 constitutes a circuit, voltage-dropping type capacitor and inductor energy-storage module, inductance L1, electronic switch Sa, capacitor Ca_
1, capacitor Co and load Z constitute another circuit.
Further, electronic switch Sa uses the electronic switch of one-way conduction, i.e. its electric current is from end when electronic switch Sa is connected
Mouth c is flowed into and is flowed out from port d；Electronic switch Sb uses the electronic switch of one-way conduction, i.e. Shi Qi electricity is connected in electronic switch Sb
Stream is flowed into from port e and is flowed out from port f.The preferred embodiment is electric current reflux in order to prevent.
The electronic switch Sa includes that diode Da_2, N-type metal-oxide-semiconductor Ma_1 and controller a, the controller a have end
Mouth vga, the anode of diode Da_2 are connected with the port c of the electronic switch Sa, the cathode and N-type metal-oxide-semiconductor of diode Da_2
The drain electrode of Ma_1 is connected, and the source electrode of N-type metal-oxide-semiconductor Ma_1 is connected with the port d of the electronic switch Sa, the door of N-type metal-oxide-semiconductor Ma_1
Pole is connected with the port vga of the controller a.
The electronic switch Sb includes that diode Db_3, N-type metal-oxide-semiconductor Mb_1 and controller b, the controller b have end
Mouth vgb, the anode of diode Db_3 are connected with the port e of the electronic switch Sb, the cathode and N-type metal-oxide-semiconductor of diode Db_3
The drain electrode of Mb_1 is connected, and the source electrode of N-type metal-oxide-semiconductor Mb_1 is connected with the port f of the electronic switch Sb, the door of N-type metal-oxide-semiconductor Mb_1
Pole is connected with the port vgb of the controller b.
The controller a determines the working condition of N-type metal-oxide-semiconductor Ma_1, and controller b determines the work shape of N-type metal-oxide-semiconductor Mb_1
State, the controller a and controller b are all made of power supply control chip.
Further, the phase of the output signal vgsa and vgsb of controller a and controller b successively lag the angle of setting
The value range of θ, θ are 0 to 2 π.
Technical concept of the invention are as follows: using 1 inductance that booster type capacitor and inductor energy-storage module and voltage-dropping type capacitor is electric
Sense energy-storage module cascades up, and has not only realized the transformation of efficient buck, but realize between continuous input current, grade electric current it is continuous,
Output electric current is continuous, output and input total ground and output voltage polarity is constant.
Beneficial effects of the present invention are mainly manifested in: the cascade buck-boost type DC-DC converter circuit structure is simple,
Applicable control method multiplicity has high efficiency, outputs and inputs continuous electric current, output and input voltage altogether and polarity one
It causes, output voltage Vo is greater than, less than or equal to the operating characteristic of direct current power source voltage Vi.
Detailed description of the invention
Fig. 1 is a kind of circuit diagram of the invention.
Fig. 2 is another circuit diagram of the invention.
Fig. 3 be in the present invention controller 1 to the timing diagram of controller n output signal.
Fig. 4 is simulation work waveform diagram of the embodiment of the present invention 1 under conditions of θ=0.
Fig. 5 is simulation work waveform diagram of the embodiment of the present invention 1 under conditions of θ=π.
Fig. 6 is simulation work waveform diagram of the embodiment of the present invention 2 under conditions of θ=0.
Fig. 7 is simulation work waveform diagram of the embodiment of the present invention 2 under conditions of θ=π.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Embodiment 1
With reference to Fig. 1 and Fig. 3~Fig. 5, a kind of cascade buck-boost type DC-DC converter, including inductance L1,1 booster type
Capacitor and inductor energy-storage module, 1 voltage-dropping type capacitor and inductor energy-storage module and capacitor Co, booster type capacitor and inductor energy-storage module have
Port Via+, port Voa+ and port Gnda, voltage-dropping type capacitor and inductor energy-storage module have port Vib+, port Vob+ and port
One end of Gndb, capacitor Co are connected with one end of load Z, load the other end of Z while the other end, DC power supply with capacitor Co
The port Gndb phase of the negative terminal of Vi, the port Gnda of booster type capacitor and inductor energy-storage module and voltage-dropping type capacitor and inductor energy-storage module
Even, the rest part and inductance L1 of booster type capacitor and inductor energy-storage module and voltage-dropping type capacitor and inductor energy-storage module are located at direct current
It between source Vi and capacitor Co and is in series relationship, the port Via+ and DC power supply Vi of booster type capacitor and inductor energy-storage module are just
End is connected, and the port Voa+ of booster type capacitor and inductor energy-storage module is connected with one end of inductance L1, the other end and drop of inductance L1
The port Vib+ of die mould capacitor and inductor energy-storage module is connected, the port Vob+'s and capacitor Co of voltage-dropping type capacitor and inductor energy-storage module
One end is connected.
The booster type capacitor and inductor energy-storage module includes diode Da_1, capacitor Ca_1, inductance La_1 and electronic switch
Sa, the electronic switch Sa have a port c and port d, the anode of diode Da_1 simultaneously with booster type capacitor and inductor energy storage mould
The port c of the port Via+ and electronic switch Sa of block are connected, the cathode of diode Da_1 one end with capacitor Ca_1 and liter simultaneously
The port Voa+ of die mould capacitor and inductor energy-storage module is connected, the port d of electronic switch Sa simultaneously with the other end of capacitor Ca_1 and
One end of inductance La_1 is connected, and the other end of inductance La_1 is connected with the port Gnda of booster type capacitor and inductor energy-storage module.
The voltage-dropping type capacitor and inductor energy-storage module includes diode Db_1, capacitor Cb_1, diode Db_2, inductance Lb_
1 and electronic switch Sb, the electronic switch Sb have a port e and port f, one end of capacitor Cb_1 simultaneously with voltage-dropping type capacitor
The port e of the port Vib+ and electronic switch Sb of inductive energy storage module are connected, the other end of capacitor Cb_1 simultaneously with diode Db_
1 anode is connected with one end of inductance Lb_1, the cathode of diode Db_1 while the end with voltage-dropping type capacitor and inductor energy-storage module
Mouth Vob+ is connected with the port f of electronic switch Sb, and the other end of inductance Lb_1 is connected with the cathode of diode Db_2, diode
The anode of Db_2 is connected with the port Gndb of voltage-dropping type capacitor and inductor energy-storage module.
Further, the electronic switch Sa use one-way conduction electronic switch, i.e. the electronic switch Sa be connected when its
Electric current is flowed into from port c and is flowed out from port d；The electronic switch Sb uses the electronic switch of one-way conduction, i.e., the described electronics
Its electric current is flowed into from port e and is flowed out from port f when switch Sb is connected.
Further, the electronic switch Sa includes diode Da_2, N-type metal-oxide-semiconductor Ma_1 and controller a, the control
Device a has port vga, and the anode of diode Da_2 is connected with the port c of the electronic switch Sa, the cathode of diode Da_2 and
The drain electrode of N-type metal-oxide-semiconductor Ma_1 is connected, and the source electrode of N-type metal-oxide-semiconductor Ma_1 is connected with the port d of the electronic switch Sa, N-type metal-oxide-semiconductor
The gate pole of Ma_1 is connected with the port vga of the controller a.
The electronic switch Sb includes that diode Db_3, N-type metal-oxide-semiconductor Mb_1 and controller b, the controller b have end
Mouth vgb, the anode of diode Db_3 are connected with the port e of the electronic switch Sb, the cathode and N-type metal-oxide-semiconductor of diode Db_3
The drain electrode of Mb_1 is connected, and the source electrode of N-type metal-oxide-semiconductor Mb_1 is connected with the port f of the electronic switch Sb, the door of N-type metal-oxide-semiconductor Mb_1
Pole is connected with the port vgb of the controller b.
The controller a determines the working condition of N-type metal-oxide-semiconductor Ma_1, and controller b determines the work shape of N-type metal-oxide-semiconductor Mb_1
State, the controller a and controller b are all made of conventional power supply control chip, such as: controller a can be used UC3842 and
UC3842 etc. can be used in the combination of IR2110 etc., controller b.
Further, the phase of the output signal vgsa and vgsb of controller a and controller b successively lag the angle of setting
The value range of θ, θ are 0 to 2 π.
When embodiment 1 is in continuous conduction mode (CCM), steady operation process includes following multiple stages.
(1) when N-type metal-oxide-semiconductor Ma_1 end when, diode Da_1 conducting, DC power supply Vi, diode Da_1, inductance L1 and
Voltage-dropping type capacitor and inductor energy-storage module constitutes a circuit, DC power supply Vi, diode Da_1, capacitor Ca_1 and inductance La_1 structure
At another circuit.At this point, Ca_1 charges, La_1 puts magnetic, and the working condition of L1 and voltage-dropping type capacitor and inductor energy-storage module
Working condition is related.
(2) when N-type metal-oxide-semiconductor Ma_1 is connected, diode Da_1 cut-off, DC power supply Vi, diode Da_2, N-type metal-oxide-semiconductor
Ma_1 and inductance La_1 constitutes a circuit, DC power supply Vi, diode Da_2, N-type metal-oxide-semiconductor Ma_1, capacitor Ca_1, inductance L1
Another circuit is constituted with voltage-dropping type capacitor and inductor energy-storage module.At this point, Ca_1 discharges, La_1 magnetizes, and the working condition of L1
It is related to the working condition of voltage-dropping type capacitor and inductor energy-storage module.
(3) when N-type metal-oxide-semiconductor Mb_1 end when, diode Db_1 conducting, booster type capacitor and inductor energy-storage module, inductance L1,
Capacitor Cb_1, diode Db_1, capacitor Co and load Z constitute a circuit, diode Db_2, inductance Lb_1, diode Db_1,
Capacitor Co and load Z constitute another circuit.At this point, Cb_1 charges, Lb_1 puts magnetic.
(4) when N-type metal-oxide-semiconductor Mb_1 be connected when, diode Db_1 cut-off, booster type capacitor and inductor energy-storage module, inductance L1,
Diode Db_3, N-type metal-oxide-semiconductor Mb_1, capacitor Co and load Z constitute a circuit, diode Db_2, inductance Lb_1, capacitor Cb_
1, diode Db_3, N-type metal-oxide-semiconductor Mb_1, capacitor Co and load Z constitute another circuit.At this point, Cb_1 discharges, Lb_1 magnetizes.
Fig. 4 is simulation work waveform diagram of the embodiment 1 under conditions of θ=0.Fig. 5 is embodiment 1 under conditions of θ=π
Simulation work waveform diagram.By Fig. 4 and Fig. 5 it is found that the input current ii of embodiment 1 is continuous, output electric current iob is continuous, between grade
Electric current ioa is also continuous, and output voltage Vo, which can be greater than, is also smaller than direct current power source voltage Vi, Vo and Vi altogether and same polarity.Comparison
Fig. 4 and Fig. 5 is it is found that there is influence to the ripple of ii, iob and ioa in θ.
Embodiment 2
With reference to Fig. 2, Fig. 3, Fig. 6 and Fig. 7, a kind of cascade buck-boost type DC-DC converter, the voltage-dropping type capacitor and inductor
The port Vib+ of energy-storage module is connected with the anode of DC power supply Vi, the port Vob+ and electricity of voltage-dropping type capacitor and inductor energy-storage module
The one end for feeling L1 is connected, and the other end of inductance L1 is connected with the port Via+ of booster type capacitor and inductor energy-storage module, booster type electricity
The port Voa+ for holding inductive energy storage module is connected with one end of capacitor Co.
The controller a uses the combination of UC3842 and IR2110 etc. using UC3842 etc., controller b.
Remaining structure and embodiment 1 of embodiment 2 are identical.
When embodiment 2 is in continuous conduction mode (CCM), steady operation process includes following multiple stages.
(1) when N-type metal-oxide-semiconductor Mb_1 ends, diode Db_1 conducting, DC power supply Vi, capacitor Cb_1, diode Db_
1, inductance L1 and booster type capacitor and inductor energy-storage module constitute a circuit, diode Db_2, inductance Lb_1, diode Db_1,
Inductance L1 and booster type capacitor and inductor energy-storage module constitute another circuit.At this point, Cb_1 charges, the working condition and boosting of L1
The working condition of type capacitive energy storage module is related.
(2) when N-type metal-oxide-semiconductor Mb_1 is connected, diode Db_1 cut-off, DC power supply Vi, diode Db_3, N-type metal-oxide-semiconductor
Mb_1, inductance L1 and booster type capacitor and inductor energy-storage module constitute a circuit, diode Db_2, inductance Lb_1, capacitor Cb_1,
Diode Db_3, N-type metal-oxide-semiconductor Mb_1, inductance L1 and booster type capacitor and inductor energy-storage module constitute another circuit.At this point, Cb_
1 electric discharge, the working condition of L1 are related to the working condition of booster type capacitive energy storage module.
(3) when N-type metal-oxide-semiconductor Ma_1 end when, diode Da_1 conducting, voltage-dropping type capacitor and inductor energy-storage module, inductance L1,
Diode Da_1, capacitor Co and load Z constitute a circuit, voltage-dropping type capacitor and inductor energy-storage module, inductance L1, diode Da_
1, capacitor Ca_1 and inductance La_1 constitute another circuit.At this point, Ca_1 charges.
(4) when N-type metal-oxide-semiconductor Ma_1 be connected when, diode Da_1 cut-off, voltage-dropping type capacitor and inductor energy-storage module, inductance L1,
Diode Da_2, N-type metal-oxide-semiconductor Ma_1 and inductance La_1 constitute a circuit, voltage-dropping type capacitor and inductor energy-storage module, inductance L1,
Diode Da_2, N-type metal-oxide-semiconductor Ma_1, capacitor Ca_1, capacitor Co and load Z constitute another circuit.At this point, Ca_1 discharges.
Fig. 6 is simulation work waveform diagram of the embodiment 2 under conditions of θ=0.Fig. 7 is embodiment 2 under conditions of θ=π
Simulation work waveform diagram.By Fig. 6 and Fig. 7 it is found that the input current ii of embodiment 2 is continuous, output electric current ioa is continuous, between grade
Electric current iob is also continuous, and output voltage Vo, which can be greater than, is also smaller than direct current power source voltage Vi, Vo and Vi altogether and same polarity.Comparison
Fig. 6 and Fig. 7 is it is found that there is influence to the ripple of ii, ioa and iob in θ.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Range should not be construed as being limited to the specific forms stated in the embodiments, and protection scope of the present invention is also and in this field skill
Art personnel conceive according to the present invention it is conceivable that equivalent technologies mean.
Claims (7)
1. a kind of cascade buck-boost type DC-DC converter, it is characterised in that: the cascade buck-boost type DC-DC converter
Including inductance L1,1 booster type capacitor and inductor energy-storage module, 1 voltage-dropping type capacitor and inductor energy-storage module and capacitor Co, booster type
Capacitor and inductor energy-storage module has port Via+, port Voa+ and port Gnda, and voltage-dropping type capacitor and inductor energy-storage module has end
One end of mouthful Vib+, port Vob+ and port Gndb, capacitor Co are connected with one end of load Z, load the other end of Z and meanwhile with electricity
Hold the other end of Co, the negative terminal of DC power supply Vi, the port Gnda of booster type capacitor and inductor energy-storage module and voltage-dropping type capacitor electricity
Feel energy-storage module port Gndb be connected, booster type capacitor and inductor energy-storage module and voltage-dropping type capacitor and inductor energy-storage module remaining
Part and inductance L1 between DC power supply Vi and capacitor Co and are in series relationship；
The booster type capacitor and inductor energy-storage module includes diode Da_1, capacitor Ca_1, inductance La_1 and electronic switch Sa, institute
Electronic switch Sa is stated with port c and port d, the anode of diode Da_1 while the end with booster type capacitor and inductor energy-storage module
Mouth Via+ is connected with the port c of electronic switch Sa, and the cathode of diode Da_1 is electric with one end of capacitor Ca_1 and booster type simultaneously
The port Voa+ for holding inductive energy storage module is connected, the port d of electronic switch Sa while the other end and inductance La_ with capacitor Ca_1
1 one end is connected, and the other end of inductance La_1 is connected with the port Gnda of booster type capacitor and inductor energy-storage module；
The voltage-dropping type capacitor and inductor energy-storage module includes diode Db_1, capacitor Cb_1, diode Db_2, inductance Lb_1 and electricity
Sub switch Sb, the electronic switch Sb have port e and port f, and one end of capacitor Cb_1 is stored up with voltage-dropping type capacitor and inductor simultaneously
The port e of the port Vib+ and electronic switch Sb of energy module are connected, the other end of capacitor Cb_1 while the sun with diode Db_1
Pole is connected with one end of inductance Lb_1, the cathode of diode Db_1 while the port Vob+ with voltage-dropping type capacitor and inductor energy-storage module
It is connected with the port f of electronic switch Sb, the other end of inductance Lb_1 is connected with the cathode of diode Db_2, the sun of diode Db_2
Pole is connected with the port Gndb of voltage-dropping type capacitor and inductor energy-storage module.
2. cascade buck-boost type DC-DC converter as described in claim 1, it is characterised in that: the booster type capacitor electricity
Sense energy-storage module port Via+ be connected with the anode of DC power supply Vi, the port Voa+ of booster type capacitor and inductor energy-storage module and
One end of inductance L1 is connected, and the other end of inductance L1 is connected with the port Vib+ of voltage-dropping type capacitor and inductor energy-storage module, voltage-dropping type
The port Vob+ of capacitor and inductor energy-storage module is connected with one end of capacitor Co.
3. cascade buck-boost type DC-DC converter as described in claim 1, it is characterised in that: the voltage-dropping type capacitor electricity
Sense energy-storage module port Vib+ be connected with the anode of DC power supply Vi, the port Vob+ of voltage-dropping type capacitor and inductor energy-storage module and
One end of inductance L1 is connected, and the other end of inductance L1 is connected with the port Via+ of booster type capacitor and inductor energy-storage module, booster type
The port Voa+ of capacitor and inductor energy-storage module is connected with one end of capacitor Co.
4. the cascade buck-boost type DC-DC converter as described in one of claims 1 to 3, it is characterised in that: the electronic cutting
The electronic switch that Sa uses one-way conduction is closed, i.e. its electric current is flowed into from port c and flowed from port d when the electronic switch Sa is connected
Out, the electronic switch Sb uses the electronic switch of one-way conduction, i.e. its electric current is flowed from port e when the electronic switch Sb is connected
Enter and is flowed out from port f.
5. cascade buck-boost type DC-DC converter as claimed in claim 4, it is characterised in that: the electronic switch Sa packet
Include diode Da_2, N-type metal-oxide-semiconductor Ma_1 and controller a, the controller a has a port vga, the anode of diode Da_2 with
The port c of the electronic switch Sa is connected, and the cathode of diode Da_2 is connected with the drain electrode of N-type metal-oxide-semiconductor Ma_1, N-type metal-oxide-semiconductor
The source electrode of Ma_1 is connected with the port d of the electronic switch Sa, the port of the gate pole of N-type metal-oxide-semiconductor Ma_1 and the controller a
Vga is connected,
The electronic switch Sb includes that diode Db_3, N-type metal-oxide-semiconductor Mb_1 and controller b, the controller b have port
Vgb, the anode of diode Db_3 are connected with the port e of the electronic switch Sb, the cathode and N-type metal-oxide-semiconductor Mb_ of diode Db_3
1 drain electrode is connected, and the source electrode of N-type metal-oxide-semiconductor Mb_1 is connected with the port f of the electronic switch Sb, the gate pole of N-type metal-oxide-semiconductor Mb_1
It is connected with the port vgb of the controller b.
6. cascade buck-boost type DC-DC converter as claimed in claim 5, it is characterised in that: the controller a and control
Device b is all made of power supply control chip.
7. such as cascade buck-boost type DC-DC converter described in claim 5 or 6, it is characterised in that: the controller a and
The phase of the output signal vgsa and vgsb of controller b successively lag the angle, θ of setting, and the value range of θ is 0 to 2 π.
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| CN201811336763.8A CN109391152A (en) | 2018-11-12 | 2018-11-12 | Cascade buck-boost type DC-DC converter |
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| CN201811336763.8A CN109391152A (en) | 2018-11-12 | 2018-11-12 | Cascade buck-boost type DC-DC converter |
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| CN108736715A (en) * | 2018-07-02 | 2018-11-02 | 浙江工业大学 | Buck DC-DC converter |
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| CN102097969A (en) * | 2011-01-18 | 2011-06-15 | 清华大学 | Bidirectional cascade voltage-increasing and decreasing direct current-alternating current converter |
| US20150171746A1 (en) * | 2013-12-16 | 2015-06-18 | National Tsing Hua University | Buck type dc-to-dc converter and method of operating the same |
| CN105958823A (en) * | 2016-06-28 | 2016-09-21 | 华南理工大学 | Current continuous high-gain switch voltage rise quasi-Z-source converter circuit |
| CN106059301A (en) * | 2016-08-15 | 2016-10-26 | 北京飞跃新能科技有限公司 | Voltage transformation device |
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